First Phenomena: Its yellow and brown colors appear internally in the solar panel. Due to solar panel poor manufacturer understanding of material science, there will be unusual chemical reactions happened internally and cause the rear white plastic to turn to brown or yellow, also, this may happen to solar cells surface due to chemical reactions between silicon cell surface and chemicals used to treat the solar panel glass.
Solar inverter is a main device and important part of PV on grid power system. In order to ensure the normal operation of the solar PV grid tie system, the correct configuration and selection of solar inverters are particularly important. For the configuration of the solar inverter, in addition to considering the technical specifications of the entire photovoltaic power generation system and referring to the product manual, the following technical features should also be considered: rated output power, output voltage adjustability, overall efficiency and start-up performance.
Solar panels like any other product are Not the same, as some solar panels manufacturers use the high quality equipment and materials in manufacturing process, while others do Not. The used high quality materials will lead to high solar panels performance and high reliability. Those solar products manufacturers who always conduct researches to develop their solar panels manufacturing process are absolutely the best for us to buy from even their prices may be a bit higher than others.
Those are 3 important components in any solar panel with high influence on solar panel quality, performance and life span. So, let us show their effects and how can we choose the best characteristics as following:
Sine Wave Inverter vs UPS
Saturday, February 27, 2021
An inverter is a device composed of inverter device and component, which is directly different from a transformer. In other words, the inverter can realize DC input and then output AC. The working principle is similar to that of a switching power supply, but the oscillation frequency is within a certain range. For example, if the frequency is 50Hz, the output will be AC 50Hz. An inverter is a device that its frequency can be changed. UPS (Uninterruptible Power System/Uninterruptible Power Supply) is system equipment that connects batteries (mostly lead-acid maintenance-free batteries) with the host, and converts DC power into mains power through module circuits such as the host inverter. It provides uninterrupted power, and is mainly used to some equipment that requires high power supply stability.
Centrifugal pump is a pump that relies on the centrifugal force generated when the impeller rotates to transport liquid. What causes the centrifugal pump to fail to deliver water? Here are the failure analyses.
1. Some users do not fill enough water before the pump is started. Sometimes it seems that the water filled has overflowed from the vent hole, but the pump shaft is not rotated and the air is completely discharged, causing a little air to remain in the inlet pipe or pump body.
The solar inverter is the safety control center of PV system. Thus, during the PV system operation, the inverter condition, including the temperature and operation of interval cavity and main element, the bus voltage and the communication among chips, shall be inspected from time to time. In addition, the insulation among components and DC system, the DC voltage and current, the AC output voltage, current and frequency shall also be inspected. In case of any failure, it shall be solved in time.
The difference of series inverter and parallel inverter is that they use different oscillation circuits. The series inverter connects L, R and c in series and parallel inverter connects L, R and c in parallel.
Series Inverter vs. Parallel Inverter
The load circuit of series inverter has low impedance. The voltage source power supply is required and the large filter capacitor shall be connected at the DC power terminal in parallel. If the inverter fails, it is difficult to provide protection because of large surge current. The load circuit of parallel inverter shows high impedance and the current source power supply is required. The large reactor shall be connected at the DC power terminal in series. If the inverter fails, it is easy to provide protection because the large inductor can limit the current so as to avoid large impact.
Solar inverter is an electronic product and its service life is limited due to the limit of the components. However, many inverters are damaged before the service life expires and the actual service life is shorter than the designed theoretical service life. The service life is determined by the product quality and the post-period installation, operation and maintenance conditions. So, how to improve the service life of the solar inverter?
Solar inverter shall realize the highest efficiency in wide power range conditions. Meanwhile, using a solar inverter shall meet the strict safety requirements. The property of the solar inverter is essentially determined by the accurate measurement of basic electricity. The safety criteria that shall be followed by solar inverter designers may become stricter and stricter. For instance, just like the limit on the input of DC power into the grid, some consensus may be reached on the allowable total harmonic wave of the solar inverter output current. By far, many different local limitations are put forward based on the layout situation. Thus, it requires that when the power grid frequency is greatly higher than 50Hz or 60Hz, the current shall be measured accurately.
In the solar PV grid system, the solar module, inverter, and power grid can constitute the electrical system. The component will convert the solar energy based on the solar radiation and then the inverter will output related power. Thus, an on-grid inverter does not have special demand on the AC overload because basically, the inverter output power will not exceed component power. In the solar PV off-grid system, components, batteries, inverter, and load constitute the electrical system. The output power of the inverter is decided by the load. The start power of the motor of some inductive-load devices like air conditioners or water pumps is 3-5 times the rated power. Thus, the off-grid inverter has special requirements for overload situations.
Solar pump inverter is used to control and regulate the operation of solar water pump system (PV pumping system). It can convert the DC from the solar array into AC to drive the water pump. In addition, it can adjust the output frequency in real time according to the sunlight intensity so as to achieve maximum power point tracking (MPPT). Solar pump inverter is one of the various types of power inverters. Its function is similar with the function of common on grid inverter. The two inverters are both used to convert solar DC into AC. But the solar pump inverter is greatly improved. Thus, it can greatly save the system cost and can expand the solar energy application range.
Full name of the micro inverter is micro solar on grid inverter. It generally refers to inverters with power below 1500W and module-level MPPT. It is mostly used in photovoltaic power generation systems. Micro is relatively small compared to traditional centralized inverters. The micro inverter inverts each component. Its advantage is that each component can be independently controlled by MPPT, which can greatly improve the overall efficiency. At the same time, micro inverter can also avoid the DC high voltage, poor light effect, and wooden barrel effect of the centralized inverter. Micro inverters manage the collection of solar energy at the level of a single panel to improve the efficiency of the solar equipment, rather than working in the entire system like a central inverter. In the past, in order to ensure maximum power output during solar energy harvesting, the complex control mechanisms used increased costs and restricted the acceptance of micro-inverters. Complex and cost-effective IC and processor-based solutions can handle the logic control of micro inverter designs. Various voltage controllers and regulators also provide complementary solutions for solar panel DC output power generation.
The inverter plays an important role in the photovoltaic grid-connected system design. It can convert the solar energy into DC energy and then invert it to the single-phase AC energy that can be applied by various devices.
The micro inverter technology means the technology of directly connecting inverter with single PV module. Each PV module can be equipped with an inverter that can realize AC-DC conversion and can track the maximum power point. It can directly convert the power generated by PV module into the AC energy so that it can realize AC load purpose or it can be transmitted to the power grid.
In the solar PV grid tie system, the power of photovoltaic module is related to the inverter. The power matching between PV modules and solar grid tie inverters is not in a relationship of 1:1 fixed ratio, so it needs to be considered comprehensively based on the specific conditions of the project. The main influencing factors include irradiance, system loss, component installation angle, efficiency and life span of the on grid inverter, etc.
Inductor heating is one of the common faults in the use of sine wave inverters. There are two problems resulting to inductor heating: excessive loss on the inductor and poor heat dissipation conditions. The best way to solve the serious problem of heating is to start from the perspective of loss (inductance loss and magnetic core loss).
Centrifugal pump is a pumping machine that uses the centrifugal movement of water to work. Its basic components are a high-speed rotating impeller and a fixed snail-shaped pump casing. Generally, centrifugal pumps have several (usually 4-12) impellers with backward curved blades fastened to the pump shaft, and the impeller is driven by the motor to rotate at a high speed along with the pump shaft.
Do you accept to receive a quote for installing a new bathroom in your house via phone call without the installer visit to your house? Of course, the answer is No. That is same like installing a solar photovoltaic system on your house roof, it’s a must for the solar installer to come the house and check/inspect all your private circumstances and conditions, and absolutely not sufficient to get a quote via phone or internet email.
In the realm of renewable energy and sustainable power solutions, inverters play a pivotal role in converting direct current (DC) generated by solar panels or wind turbines into alternating current (AC) for use in homes, businesses, and industries. Two primary types of inverters dominate this landscape: on-grid inverters and off-grid inverters. Each serves distinct purposes and operates within different contexts. Inverter.com will introduce on-grid inverters and off-grid inverters, and discuss the working principles of off-grid inverters and on-grid inverters, as well as their differences.
As to the optimization of the efficiency and reliability for solar photovoltaic system, a rather new means is to use the micro inverter, which shall be connected to each solar panel. Equipping a separate micro inverter for each solar panel can make the system adapt to changing loads and weather conditions, thereby providing the best conversion efficiency for a single panel and the entire system. The micro-inverter architecture can also simplify wiring, which means lower installation costs. By making consumer solar power systems more efficient, the time required for the system to get back the initial investment in solar technology will be reduced.
